Insulating-support.



H. P- LI VERSIDGE.

INSULATING SUPPORT.

APPLICATION FILED MAR. 9. 1917.

1,252,353. Pdtented Ian. 1,1918;

3 SHEETSSHEET I."

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INVENTOR H. P. LIVERSIDGE.

.INSULATING SUPPORT.

APPLICATION FILED MAR. 9,1917.

Patented Jan. 1,1918

3 SHEETS-SHEET 2.

INVENTQ LW M .M 1., U 0 n I m l I n J H. P. LIVERSIDGE.

INSULATING SUPPORT.

APPLICATION FILED MAR. 9. 19:1.

a i Z IIIIIIIIID IIIID SSESI E N H W ATTORNEY? HORACE P. LIVERSIIDGE, OF PHILADELPHIA, PENNSYLVANIA.

INSULATING-SUPPORT.

Specification of Letters Patent.

Patented Jan. 1, 1918.

Application filed March 9, 1917. Serial No. 153,707.

To all whom it may concern:

Be it known that I, HORACE P. L1'VER- SIDGE, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Insulating-Support, of which the following is a specification.

My invention relates to insulating supports and consists more particularly in a novel manner of fastening the base supports and metal tops to insulators, vwhereby a better device is produced than heretofore, and I am enabled not only to eliminate the use of split castings clamped about the insulator, which have heretofore been employed, but I also eliminate the use of clamping nuts also heretofore used, which have been found to give unsatisfactory results, since they allow a point of electrostatic breakdown and cause a much lower flash-over of the combin-ation.

By my novel construction of top and base members and the novel fastening devices common thereto and to the insulator, I am enabled to provide for a uniform stress upon the porcelain or other material of which the insulator may be made, thereby attaining a much higher cantaliver and tensile strain than can be obtained by the conventional clamping devices now generally employed.

To the above ends, my invention consists of the novelconstruction of insulating support and its adjuncts, as will be hereafter described and pointed out in the claims.

For the purpose of illustrating my invention, I have shown in the accompanying drawing one form thereof which is at present preferred by me, since the same will be found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrangement and organization of these instrumentalities as herein shown and described.

Figure 1 represents a side elevation of an insulating support and its adjuncts, embodying my invention.

Fig. 2 represents a vertical sectional view of Fig. 1.

Fig. 3 represents a section on line 3-3 of Fig. 2. a

Fig. 4 represents, on an enlarged scale, a bottom plan view of Fig. 2.

Fig. 5 represent a plan view of a cap member employed.

Fig. 6 represents in elevation and partial central section, another construction shown also in Figs. 7 and 8.

Fig. 7 represents in perspective another preferred form of the base of the insulator support.

Fig. 8 represents in centrahvertical, sectional elevation, my insulating'support in place upon the base represented in Fig. 7. Figs. 9 and 10 represent sectional vlews, partly in elevation, of modifications.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings,

1 designates my novel construction of insulatmg support, the same comprising the insulator 2 of porcelain or other suitable material, which has the cored out cavity 3 and the corrugations 4,,said insulator being otherwise of the usual or conventional type, except as hereafter explained. The base or lower portion of the insulator is recessed, as indicated at 5, for the reception of the externally threaded ring 6, the latter being surrounded on three of its sides by the fiber or other cushioning material, as indicated at 7, 8 and 9 in Fig. 2."

10 designates the base of the insulator support, which as will be understood from Fig. 4 may be of a rectangular or other shape and is provided with the openings 11, whereby the base can be secured by any suitable fastening devices to any desired or convenient point. The base 10 is provided with the upwardly extending annular flange 12, which is internally threaded, as indicated at 13, to engage the externally threaded portion 14 of the ring 6, so that when the ring and flange 12 are screwed into assembled position, as indicated at the lower portion of Fig. 2, it will be apparent that the insulator proper will be firmly and rigidly held in the desired position. 1

At the upper portion of the insulator 2, I provide a recess, as indicated at 15, wherein I locate an externally threaded ring 16, said ring being preferably of metal and having interposed between it and the body of the insulator 2 the cushioning material 17, which is preferably of U-shape, as will be understood from Fig. 2.

18 designates an internally threaded ring or coupling which is screwed into engagement with the locking ring 16, said ring 18 having screwed into its upper portion the threaded portion of the flange 19 or casting, whose top 20 may be of any suitable contour for supporting or clamping'an electric conductor of any desired contour and is provided with the flanges 21, upon which are seated the flanges 22 of the cap 23, said cap being secured in position by the bolts or other fastening device 2 1, although other fastening devices may be employed. The manner of assembling the parts will be un derstood by those skilled in the art from Fig. 2 and it will be apparent that when the parts 19, 18 and 16 are screwed into assembled position and the base member 10 is screwed into engagement with the locking ring 6, both the base and top members are firmly and effectively united to the insulator 2, whereby a device of great efiiciency and rigidity is produced and one wherein the use of the split castings clamped around the insulator, which have heretofore been employed, is entirely dispensed with, and it will furthermore be apparent that by my invention the use of clamping nuts heretofore employed, which allow a point of electrostatic breakdown and cause a much lower flashover of the combination is entirelyeliminated.

As a means of securing or locking the internally threaded ring 18 to the flange or casting 19, I apply to the under surface of the-flange 19 either by extending its depth or by attaching it as a separate member, a spring plate 27, Fig. 3, extending radially outward, and as to a segment of its periphery threaded at 28 to engage with the internal threads of the ring 18,while threaded through both the flange 19 and the plate 27 is a screw 26 the tightening up of which, as is obvious, will draw the plate 27 toward the flange 19 and firmly lock the threads 28 of said plate 27 against the internal threads of the ring 18. Ihis device serves as a nutlock to lock the ring 18 and the flange 19 together.

In the construction represented in Fig. 6, I form within or upon the flanges. 22 of the cap 23 sockets 29, within which are contained spiral springs 30 interposed between the heads of the bolts 24 and the base of the flanges 22. These springs serve to accomplish what is in effect a resilient connection etween the cap 23 and the trough 20, or its equivalent. I

In the construction represented in Figs. 6, 7 and 8, I provide the base 10 of the insulator support with n upwardly extending hollow stud 31, which is preferably integral with the base and preferably also provided with external circumferential grooves 32. This stud serves as an additional means of assuring the firm and rigid relative disposition of the insulating support proper and the base. When I use the stud 31 I enlarge the cored out cavity 3 of the insulator body 2, so that its internal diameter is greater than the external diameter of the stud and its vertical length greater than the length of the stud. By this enlargement, I form, as will be apparent from Figs. 6 and 8, a chambered recess which is the equivalentof 3 in Figs. 2 and 4 and is of sufficient dimensions to contain a mass of insulating material 33, which spreads itself around and over the top of the stud 31. To assure the retention of the insulating mass 33 internally, I provide the cavity 3 with a plurality of circumferential grooves 34, into which the mass of the insulating material enters and forms in connection with the grooves 32 on the stud, a vertical lock, so to speak, which additionally confines the body of the insulator 2 to the base 10.

It will be seen from the foregoing that the manner of connecting the base member 10 to the intermediate coupling devices common thereto and to the insulator, is substantially the same in all the embodiments of my invention seen in Figs. 2, 6, 7 and 8.

In the construction seen in Fig. 9, I have shown the base member 10 as provided with the stud 31 and outer flange 12, said base member and the lower portion of the insulator beingheld in assembled position by the intermediate preferably L-shaped coupling ring having the lower member 35 and the inwardly projecting member 36, which engages the shoulder 37, the outer portion of said coupling ring being in threaded engagement with said flange 12, as indicated at 38, said coupling ring being preferably solid and if desired molded to or solidly clamping the porcelain 2. At 39 I employ a cement which looks the outer support or base member and keeps the screw thread tight. In the construction seen in Fig. 10, I have shown the stud 31 as omitted, the other parts being substantially the same as seen in Fig. 9. While the constructions seen in Figs. 9 and 10 are substantially the same so far as regards the broad principle of securing the base member to the porcelain, I have found that the molded L or similar shaped ring seen in Figs. 9 and 10 possesses the additional advantage of giving a larger clamping surface as well as a softer bearing.

It will now be apparent that I have devised a new and useful insulating support which embodies-the features of advantage enumerated as desirable in the statement of the invention and the above description, and

while I have, in the present instance, shown.

and described preferred embodiments thereof which will give in practice satisfactory and reliable results, it is to .be understood that the same are susceptible of modification in various particulars without departing from the spirit or scope of the invention or sacrificing any of its advantages.

having an internally threaded portion in engagement with said internal ring, and an upper member 1n engagement w1th sa1d latter ring.

3. The combination of an insulator having an-annular, recess in its upper portion, an externally threaded ringseated In said recess, a cushioning device intermediate said ring and insulator, an upper outer coupling ring having an internally threaded portion in engagement with said internal ring, and an upper member having an externally threaded base in threaded engagement with said upper outer couplingring.

4. The combination of an insulator having an annular recess in its lower portion, an externally threaded ring seated in said recess, a base having an upwardly extending flange internally threaded and in engagement with said ring, said insulator having an annular recess in its upper portion, an externally threaded internal ring located in said recess, an outer internally threaded coupling ring engaging said upper internal ring, and an upper base member externally threaded and engaging said outer coupling rm 5% The, combination of an insulator having an annular recess in its lower portion and a central cavity, an externally threaded ring seated in said recess, and a base having an internally threaded portion in engagement with said ring and a central stud which enters within the cavity of the insulator.

6. The combination of an insulator having an annular externally fastened base support and a central cavity, and a central stud which is fastened to said base support and which enters within said cavity of said insulator.

7. The combination of an insulator having an annular recess in its lower portion and a central cavity, an externally threaded ring located in said recess, a base having an internally threaded portion in engagement with said ring and a centralstud which enters within the cavity of the insulator, and insulating material in said cavity in-engagement with said stud.

8. The combination of an insulator having an annular recess in its lower portion and a central cavity, an externally threaded ring interlocked with said recess, a base having an internally threaded portion in engagement with said ring and a centralstud which enters within the cavity of said insulator, insulating material between said cavity and stud, an upper ring engaging the upper portion of said insulator, an upper outer couplin ring having an internally threaded portlon in engagement with said latter ring, and an upper member in threaded engagement with said outer ring.

9. The combination of an insulator hav ing an annular recess in its lower portion and a central cavity, an externally threaded ring seated in said recess, a base having an internally threaded portion in engagement with said ring and a central stud which enters within the cavity of the insulator, insulating material between the central cavityof the insulator and the central stud of the base, an integral ring for the upper portion of said insulator, an upper outer coupling ring having an internally threaded portion in engagement with said internal ring, an uppermember having a seat in threaded engagement with said outer ring, and a detachable cap supported upon said upper member.

10. As an improved article of manufacture, an insulator base ada ted to support an insulator and provide with an upwardly extending internally threaded flange and a central upwardly extending stud.

HORACE P. LIVERSIDGE.

Witnesses:

E. HAYWARD FAIRBANKS, C. D. McVAr. 

